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United States Patent | 5,667,442 |
Tanaka | September 16, 1997 |
A chain link 1 assembly body includes a pre-molded resin sleeve having a uniformly cylindrical inner periphery and a partially convexly contoured outer periphery, a bushing conformed to the shape of the sleeve and inner links each having a bushing press-fitted hole for fitting around the ends of the bushing. The method includes the step of providing an engineering plastic resin sleeve and a bushing. The sleeve is pre-molded to have a uniformly cylindrical inner periphery and an outer periphery having a convex contour for a central portion of the sleeve and uniformly cylindrical contours for the opposed ends of the sleeve. The bushing is originally uniformly cylindrical prior to its ends being press-fitted into bushing press-fitted holes of inner links. The sleeve is inserted in the bushing while the bushing is uniformly cylindrical in cross-section due to not having either of its ends press-fitted into bushing press-fitted holes of inner links (first embodiment), non-uniformly cylindrical in shape due to having one of its ends press-fitted into the bushing press-fitted hole of an inner link (second embodiment), or partially convexly contoured due to having both of its ends press-fitted into bushing press-fitted holes of inner links (third embodiment).
Inventors: | Tanaka; Koji (Osaka, JP) |
Assignee: | Tsubakimoto Chain Co. (Osaka, JP) |
Appl. No.: | 496185 |
Filed: | June 28, 1995 |
Jun 29, 1994[JP] | 6-168571 |
Current U.S. Class: | 464/49; 59/5; 59/8; 464/70; 474/207; 474/229 |
Intern'l Class: | F16D 003/54; F16D 003/70 |
Field of Search: | 464/49,70,87 59/4,5,8 474/207,228,229,230,226,227 384/296,416 |
1965145 | Jul., 1934 | Klaucke | 464/49. |
2155584 | Apr., 1939 | Bryant et al. | 59/8. |
3167935 | Feb., 1965 | Fawick | 464/49. |
3948574 | Apr., 1976 | Baylor | 474/207. |
4290236 | Sep., 1981 | Brewer et al. | 59/8. |
4926529 | May., 1990 | Hosmer et al. | 59/5. |
5305594 | Apr., 1994 | Wang | 59/4. |
Foreign Patent Documents | |||
119898 | Sep., 1984 | EP | 59/5. |
1965395 | Jan., 1971 | DE | 59/4. |
3347340 | Jul., 1985 | DE | 59/4. |
53-71743 | Jun., 1978 | JP | 59/4. |
5-278064 | Oct., 1993 | JP. |